Analysis-Argentina's Milei must look to alliances after electoral defeat

Argentina's President Javier Milei delivers a speech after Argentina's opposition Peronist party triumphed in the legislative elections in the province of Buenos Aires, leaving President Milei's ruling party in a distant second place, as per a provisional official tally, at La Libertad Avanza party headquarters, in La Plata, Buenos Aires province, Argentina, September 7, 2025. REUTERS/Tomas Cuesta

BUENOS AIRES (Reuters) -A resounding electoral defeat for Argentine President Javier Milei in the country's most populous province could force him to build political alliances, casting doubts on the government's ability to carry out its program of fiscal austerity.

Sunday's Buenos Aires provincial election saw the center-left Peronists crush the ruling La Libertad Avanza party with 47% of the vote to a distant 33%, as voters sided with the socially focused opposition over Milei's strict austerity.